Oscar Heyman Brothers sapphire and diamond ring. Set to centre with a horizontal row of eight square channel set calibre cut natural sapphries in open back rubover settings with an approximate combined weight of 1.00 carat, flanked by two rows of channel set square baguette cut diamonds in open back rubover settings, all eighteen with an approximate combined weight of 1.00 carats, to a stepped three row band ring, conforming to the finger with a structured openwork gallery and intricate square backholing, tapering down to a solid stepped shank. Marked 18 carat yellow gold, maker's mark for Oscar Heyman Brothers, numbered '30844', American, circa 1970, accompanied by Oscar Heyman Brothers authenticity certificate.
